89 Blue Gran Finale 61k - How best to sell?

The time has come to part with my 1989 Blue Mica Gran Finale. I acquired it virtually new in 1990 and happily drove it until 1999 when I moved to the US for work. Since then it has been in dry storage in a garage at my parents house in Glamorgan. As it seems increasingly unlikely that I will be moving back to the UK in the near future, the time has come to pass it on. Cosmetically it is in pretty good shape with just a few scratches and no major issues with rust, etc. Unsurprisingly it is not currently running, but it was driving fine when put into storage.
I'm a former x1/9 owner's club member and would welcome any suggestions about the best way to go about selling this car (i.e. where to advertise, etc.) and any guidance as to what sort of price I should be asking.
Many thanks
Richard